Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais são os antigos condados do distrito de Great Grimsby?
 ###Tabelas: CREATE TABLE former_districts (former_districts_id AUTO_INCREMENT PRIMARY KEY, District VARCHAR, Status VARCHAR, Date abolished VARCHAR, Former county VARCHAR, Successor VARCHAR) CREATE TABLE japan (japan_id AUTO_INCREMENT PRIMARY KEY, Place INT, Title VARCHAR, Platform VARCHAR, Publisher VARCHAR, Units sold INT) CREATE TABLE list_of_medalists (list_of_medalists_id AUTO_INCREMENT PRIMARY KEY, Medal VARCHAR, Name VARCHAR, Games VARCHAR, Sport VARCHAR, Event VARCHAR) CREATE TABLE game_results (game_results_id AUTO_INCREMENT PRIMARY KEY, 1890 No game VARCHAR, 1891 No game VARCHAR, 1892 No game VARCHAR, 1893 No game VARCHAR, 1894 WSU 10–0 Moscow VARCHAR, 1895 WSU* 10–4 Pullman VARCHAR, 1896 No game VARCHAR, 1897 No game VARCHAR, 1898 No game VARCHAR, 1899 WSU* 11–0 Pullman VARCHAR) CREATE TABLE birthstones_by_cultures (birthstones_by_cultures_id AUTO_INCREMENT PRIMARY KEY, Month VARCHAR, 15th- 20th century VARCHAR, U.S. (1912) VARCHAR, U.S. (2013) VARCHAR, Britain (2013) VARCHAR, Hindu VARCHAR)  
SELECT Former county FROM former_districts WHERE District = Great Grimsby